Rotary tool adapter



Sept. A10, 1946. R. BURK ROTARY ToL ADAPTER v Filed De. T1, 1944 Patented sept. 1o, A194.6

UNITED, STATES fr f OFFICE .ROTARY TooLnnArrEa Y Robert Burk, Brazil, Ina., assigner' kor :one-halma W. C.'Brockmeier, Brazil, Ind., :and/.one-.half tor M. R..Harding, Greenville,Mich.

Application Deeemberil, 1944,'s er'iarNo. vl567.676

'is required to removeithe tool, thisA being accomy plished lwithout removing the adapter therefor, the tool removal being effected through the-service of a hydraulic ejector, which is under the ccntrol ofa'single'attendant for the milling machine.

Another 7object of the invention isthe provision 'of an adapter of this icharactfer, `wherein -for the removal `of Ava rotary -'-too`1, such as those used `in amillingma'chine, -for drilling, reaming, spot facing,or `other fmilling work, can be conveniently releasedfrom its holder, with dispatch and ease, vat the location of su'chholder, and through hydraulic pressure underaV hammer blowen-'a plunger, which is "exposed for this purpose.

A Vfurther object of the inventionis the `provision 1.0i .an :adapterzof this acharacterfwherein the constructionthereof .is novel .and unique inthe arrangement of its parts and'the working thereof,

the adapter being retained in lthe machine and does not require removal for the changing of tools as may'benecessary for the execution of different characters of work by the said machine.

A still further object of the invention is the provision of an adapter of this character, which is simple in construction, thoroughly reliable and efficient in operation, strong, durable, possessed of few parts, readily and easily operated,requires little or no repairs, thus economical for continued service, devoid of a complicated structural setup, and inexpensive to manufacture and install.

With these and other objects in view the inven- 2 Claims. (01.7.279-103J V,Similar l'reference characters indicate corresponding parts vtliroughout the several views in the drawing. l

Referring tothe-drawing infdetail, A designates generally a portion `ofthe adapter-in its entirety, constructed-in accordance with the invention, and is practically conventional in its `complete external appearanc'eywith those now in use 1in milling machines. The adapter comprises, in this in` stance, a -truncatedy conica-l shaped body If, Ihav-- Ving for a portion of its length the 'ordinary ltool receivingsocket -I Igwhic'h'as usual opens through tion consists in the features of construction, com' bnation and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying views in the drawing forming a part hereof, which shows the vpreferred embodiment of the invention, and pointed out in the claims hereunto appended.

In the accompanying drawing: Figure 1 isa view showing the 'adapter in vertical section, as constructed in accordance with the invention, with a tool held by the adapter.

Figure 2 is a transverse sectional View taken approximately on the line 2-2 of Figure 1 looking in the direction of the arrows.

Figure 3 is a view similar to Figure 1 showing the adapter operated with the tool ejected therefrom.

thel argerendd 2 ofthe body, for `the introduction standard construction. u

Vriransversely of the body I0' is lthe drift hole I4 which communicates with the socket Ill. tThe of the tool fit, whichffor example',` is V'adrilL of 'dr'ili'iil lor'other tool: has 'a tapered shank yI5 and atan-g Iiiatthe send thereof formed vas usualiin cross section substantially rectangular vor lotherwise'with'lateral facets i1. Exampling the usual Yconstruction the vsocket IIr Vis tapered linwardly conformingto the tapered shank I5 ofthe tool for tight-fit offthelatter/within the said socket. The vtang Ifiiengages in kthe drift hole I4, 'as best seen in Figure l of the drawing, Aandthe 'facets I'l eliminate the vrotation -of the `tool'within the socket I I, as the tang Vlocks the said tool therein. In thesmall end `I8 'of thebody IIl'is a screw threaded plug socket I9 for a threaded plug 20, detachable therefrom, the plug socket I9 being in communication with an oil chamber 2 I, which confronts an ejector pin 22, having fluidtight f1tting with a clearance 23 therefor, and this pin is adapted for direct striking contact with the tang I6 when extended within the drift hole I4, as best seen in Figures 1 and 3 of the drawing. l The plug 2S is formed with a flat faced wrench engaging head 24 at its outermost end, while provided in this end and carried through the head till is an internally threaded socket 25, so

that the adapter A can be detachably fastened to a driving arbor, not shown, of a milling machine, which also is not shown in the drawing. However, the adapter may be otherwise fitted to the milling machine, for the holding of a tool required to be operated thereby. n

The plug 2U at its inner end is provided with a check or stop 26 in the path of the pin 22, to limit the throw thereof in one direction, and

Athus avoid such pin leaving its clearance 23 when retrieving within the adapter A.

Formed longitudinally in the body Ill eccentric to the tool socket II is an oil passageKZI, which at its inner end opens into an enlarged area 28 The larger end I2 of the body IIJ externally Y thereof is provided with diametrically opposed key slots 32 for use in applying the adapter A to the milling machine. However, this construction may be altered, if found necessary or otherwise required.

The pin 22 is formed with an enlarged head' 33, the clearance 23 being constructed to pro- .vide therefor in association with the pin.

`In the operation of the adapter A after the tool I3 has been tted therein, and it is desired to change tools, the operator strikes the head 3| with a hammer blow, the said plunger 30 being outwardly extended from the passage 21 a determined degree, with the head 3l exposed, and this blow results in displacing the oil within the passage and the chamber 2|, thus moving the pin 22 to a position for ejecting the tool I3 from the socket II. Whereupon the said socket II is cleared for another tool, and the placement of such tool restores the adapter to normalcy, with the plunger projected from the passage 21 in a reset condition. It will be apparent that the adapter A is a hydraulic ejector v'for a tool held thereby. Y

From the foregoing it is thought that the construction and manner of operation oi the adapter A will be clearly understood, and therefore a more extended explanation has been omitted for the sake of brevity. Furthermore, it is to be understood that changes, variations and modications may be made in the invention, as fall properly within the scope of the appended claims, lwithout departing from the spirit of the invention or sacrificing any of its advantages.

What is claimed is:

1. An adapter for a milling machine and a rotary tool therefor having a Morse taper tanged shank, comprising an elongated truncated conical body having a centrally located socket with a drift hole for a portion of its length and opening through the larger end for accommodating the tool shank and the engagement of the tang in the drift hole, the said body further being formed with an oil chamber opening through its smaller end and aligned with the drift hole, a removable plug fitting the smaller end of the body for closing the oil chamber and effecting a driving coupling between the said body and the machine, an ejecting pin within the body between the socket and the oil chamber for contacting the tank, and a hammer blow actuated plunger slidably tted longitudinally in the body within the marginal area of its larger end and extending generally in the direction of the socket for action on the content of the oil chamber to displace the ejecting pin for removing the tang of the tool shank from the drift hole.

2. An adapter for a milling machine and a rotary tool therefor having a Morse taper tanged shank, comprising an elongated truncated conical body having a centrally located socket with a drift hole for a portion of its length and opening through the larger end for accommodating the tool shank and the engagement of the tang in the drift hole, the said body further being formed with an oil chamber opening through the smaller end and aligned with the drift hole, a removable plug litting the smaller end of the body for closing the oil chamber and effecting a driving coupling between the said body and the machine, an ejecting pin within the body between the socket and the oil chamber for contacting the tank, a hammer blow actuated plunger slidably tted longitudinally in the body within the marginal area of the larger end and extending generally in the direction of the socket for action on the content of the oil chamber to displace the ejecting pin for removing the tang of the tool shank from the drift hole, and a check extension on the plug to limit the throw of the ejecting pin toward the oil chamber.

ROBERT BURK. 

